Update niceDate tests to avoid timezone issues
Update niceDate tests to avoid timezone issues

Fixes https://github.com/CookPete/auto-changelog/issues/24
Closes https://github.com/CookPete/auto-changelog/pull/25
The formatting is the main thing we want to test, not the exact date being correct (we can assume the JS engine will not fail us).

CookPete/auto-changelog,CookPete/auto-changelog